Solid‐state electrolyte materials are attractive options for meeting the safety and performance needs of advanced lithium‐based rechargeable battery technologies because of their improved mechanical and thermal stability compared to liquid electrolytes. However, there is typically a tradeoff between mechanical and electrochemical performance. Here an elastic Li‐ion conductor with dual covalent and dynamic hydrogen bonding crosslinks is described to provide high mechanical resilience without sacrificing the room‐temperature ionic conductivity. A solid‐state lithium‐metal/LiFePO₄ cell with this resilient electrolyte can operate at room temperature with a high cathode capacity of 152 mAh g⁻¹ for 300 cycles and can maintain operation even after being subjected to intense mechanical impact testing. This new dual crosslinking design provides robust mechanical properties while maintaining ionic conductivity similar to state‐of‐the‐art polymer‐based electrolytes. This approach opens a route toward stable, high‐performance operation of solid‐state batteries even under extreme abuse.

中文翻译：

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弹性锂离子导体的双交联设计

固态电解质材料是满足高级锂基可充电电池技术安全性和性能需求的极具吸引力的选择，因为与液态电解质相比，固态电解质材料具有更高的机械和热稳定性。但是，通常在机械性能和电化学性能之间需要权衡。在此描述具有双共价键和动态氢键交联键的弹性锂离子导体，以提供高的机械弹性而不牺牲室温的离子电导率。具有这种弹性电解质的固态锂金属/ LiFePO ₄电池可在室温下运行，阴极容量高达152 mAh g ^-1可以进行300次循环，即使经过严格的机械冲击测试也可以保持运行。这种新的双交联设计提供了强大的机械性能，同时保持了与最先进的聚合物基电解质相似的离子电导率。即使在极端使用情况下，这种方法也可以为固态电池的稳定，高性能运行开辟道路。